Another take beyond "low status".

I've had it described as "putting the onus on the woman to initiate contact with you". I don't know why my giving my phone number and requesting she call back with her number shouldn't count as initiating contact by me, but apparently it doesn't with some.

People expect women to offer numbers, or do they expect them to supply numbers at their discretion when asked? I'd think generally the latter, and not the former,